diff options
| author | Philip Yang <Philip.Yang@amd.com> | 2021-05-12 08:02:46 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2021-05-19 22:33:54 -0400 |
| commit | bf546940d5aa15852f58d59158965737505edc03 (patch) | |
| tree | 27839d0f1dacea03c4d3322af3cdf622af2fbb7a /drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | |
| parent | a6ce1e1aab3fafbd97e39c4dc08add725f3abd66 (diff) | |
drm/amdgpu: flush TLB if valid PDE turns into PTE
Mapping huge page, 2MB aligned address with 2MB size, uses PDE0 as PTE.
If previously valid PDE0, PDE0.V=1 and PDE0.P=0 turns into PTE, this
requires TLB flush, otherwise page table walker will not read updated
PDE0.
Change page table update mapping to return table_freed flag to indicate
the previously valid PDE may have turned into a PTE if page table is
freed.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c index 63035b78dd87..57a6ad04118c 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c @@ -1583,6 +1583,7 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params, while (cursor.pfn < frag_start) { amdgpu_vm_free_pts(adev, params->vm, &cursor); amdgpu_vm_pt_next(adev, &cursor); + params->table_freed = true; } } else if (frag >= shift) { @@ -1610,6 +1611,7 @@ static int amdgpu_vm_update_ptes(struct amdgpu_vm_update_params *params, * @res: ttm_resource to map * @pages_addr: DMA addresses to use for mapping * @fence: optional resulting fence + * @table_freed: return true if page table is freed * * Fill in the page table entries between @start and @last. * @@ -1624,7 +1626,8 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, uint64_t flags, uint64_t offset, struct ttm_resource *res, dma_addr_t *pages_addr, - struct dma_fence **fence) + struct dma_fence **fence, + bool *table_freed) { struct amdgpu_vm_update_params params; struct amdgpu_res_cursor cursor; @@ -1719,6 +1722,9 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev, r = vm->update_funcs->commit(¶ms, fence); + if (table_freed) + *table_freed = params.table_freed; + error_unlock: amdgpu_vm_eviction_unlock(vm); return r; @@ -1815,7 +1821,7 @@ int amdgpu_vm_bo_update(struct amdgpu_device *adev, struct amdgpu_bo_va *bo_va, resv, mapping->start, mapping->last, update_flags, mapping->offset, mem, - pages_addr, last_update); + pages_addr, last_update, NULL); if (r) return r; } @@ -2026,7 +2032,7 @@ int amdgpu_vm_clear_freed(struct amdgpu_device *adev, r = amdgpu_vm_bo_update_mapping(adev, adev, vm, false, false, resv, mapping->start, mapping->last, init_pte_value, - 0, NULL, NULL, &f); + 0, NULL, NULL, &f, NULL); amdgpu_vm_free_mapping(adev, vm, mapping, f); if (r) { dma_fence_put(f); @@ -3364,7 +3370,7 @@ bool amdgpu_vm_handle_fault(struct amdgpu_device *adev, u32 pasid, } r = amdgpu_vm_bo_update_mapping(adev, adev, vm, true, false, NULL, addr, - addr, flags, value, NULL, NULL, + addr, flags, value, NULL, NULL, NULL, NULL); if (r) goto error_unlock; |